Door-spring.



W. V. BURDBTT.

DOOR SPRING.

APPLICATION FILED JULYJG. 1912v 1,057,929. Patented Apr. 1, 1913 SIMMO'D ingat Gowpens, 3 burg: and State of South Garolina, have in;

mam-en o wrm SOUTH CAROLINA.

Specification of Letters Patent.

Anp licatiemflled-Jj u1y 16, 1912, Serial No. 709,720.

vented new and; useful Improvements in Door-Springs, of which the. followingis a p fication.

This invention relates to door springs, the. object in. view being-to proyide a simple door holding and closing device which has. a compound, action, in that it is, adaptedtohold the door either in a fully closed; 0! a fully open position. Furthermore, the device actsv ina double capacity, serving to forcethe door to. a fully closed or a, fully open position, and also to, check the final portion of the movement ofthe. door in either direction, so as to. prevent the slam.- min of the door. 1,

dub the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, as will be hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claims hereunto appended.

In the drawings; Figure 1 is a perspective view of the upper portion of the door and door frame, showing the door spring. of-this invention applied thereto. Fig. 2 is a horizontal secton, showing the fully closed position of the parts in full lines, and the fully open position thereof in dotted. lines. Fig. 3 is a detail perspective view of the lever. Fig. is a detail perspective view of the bracket. Fig. 5 is aview similar to Fig. 2, showing a modified form of lever. Fig. 6 is a detail view of said modified form of lever.

Referring to the drawings, 1 designates a door frame, and 2 an ordinary door, hinged to the frame at 3.

In car'ryin out the present invention, I employ a racket embodying a base. 4, from which extends an arm 5 of any suitable length, according to the size and strength of the spring to be used, the latter varying, of course, in accordance with the door in connection with which the device as a whole is used. At the inner end of the arm 5 is an overhanging lug (3, the said in and inner end ofthe arin being provi ed with bearing openings 7, in which is received the vertical journal 8 .of the door t on, has mounted thereon an :1. The other arm 13 on, at 14, one end of a. rod 15. end 17 of the arm 5 of the. n,"

spring 18, in the. opposite elitist? are inserted the long arm of said, lever to operate a operating lever. This lever comprises a long arm 9, the end portion of} ise rs tended: downward, asshown. atlO "a the preferred embodiment of th s,

t'r roller 11.- This roller. is, adapted back and forth in a slotted cured to the face*ofthedoorQfddjiic the upper edge thereof, as ;shown' of the lev has jour" [1. it a putatively short, and

through a guide opening 16 inthe circling the rod 15 is a coiled...

plugs 19. havingah'oles th the center thereof, through which the; 7 15 passes. The springas a whole, together}- with the plugs 19 thereof, is interposed 5 tween the short arm of the leverv or extension 17 at the outer end of 5. Therefore, said spring acts expa against the short arm of the-lever, ca

. 9.- the door 2 for forcing the latter to closed position, or to a fully open position,- asshowninFig.2. Under the arrangement shown in Fig. 2, the short arm of they lever. is substantially Q;

in the same plane with'the. long arm therei- "of, while in Fig. 5, the shorter-m offthelever is substant ally at rightfangles long arm thereof, Under the arrangement shown in Fig. 1, the rms of the brackit g g will extend substantially-.perpendieularto the door frame, whereas in the; arrangement shown in Fig. 5, said arm of tlie bracket will extend substantially arallel to the face of the door frame. Un ereith er arrange- 9Q ment, however, the operation is 'eka'etly. the. same, the arrangement shown in Fig. 1;be-f ing preferred, in view of the fact that it enables easy access to be obtained to the working parts of the device for adjustment and repair.

At the outer extremity of the rod 15,11 nut 20'is threaded thereon, and between wi n e b a k there i ei' eil s e' coiled expansion siring 21, which eon siderably weaker t an the main ex ansio i spring, hercinabove described, the o j t;- of

the weaker spring 21 being to check the final movement of the door and prevent the same from slamming either closed or'filliy ihary or check spring does hot come into 1 .9. opened. It will be understoodthat the anxaction, until the door is nearly closed, or on the other hand nearly opened to its full extent. At such time, the weaker check spring-comes into play and cushions the final movement of the door.

\Vhat is claimed is:

l. The combination with a hinged door and door frame, of a bracket secured to thedoor frame above the plane of the door, a door controlling lever embodying a vertical journal portion having a bearing in said bracket, and two arms, one of which has a sliding connection with the door, arod eX- tending from the other arm of said lever through a guide opening in said bracket, and-fa coiled expansion spring encircling 'said. rod and acting to force the door to a fully closed or a fully open position.

25 combination with a hinged door and. door frame, of a bracket secured. to

the door frame above the plane of the door, a door controlling lever embodying a vertical journal portion having a bearing in said bracket, and two arms, one-of which has a sliding connection with the door, a rod extending from the other arm of said lever through a guide opening in said bracket, and two coiled expansion springs encircling said rod WILLIAM v, BURDETT.

Witnesses L. O. MoCnAM, J. J. Bnown.

and acting in opposit on V to each other, one of said springs being 

